GM Fetch

A fetch API of GM_xmlhttpRequest

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/472236/1585366/GM%20Fetch.js

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Author: Secant
Version: 1.2.3
Created: 2023-08-02
Updated: 2025-05-08
Size: 5.8 KB
License: MIT

@sec-ant/gm-fetch

A fetch API for GM_xmlhttpRequest / GM.xmlHttpRequest.

Features

Use responseType: stream to prevent buffering large data when possible.
Use Typescript.
Provides es module, iife script and lib mode userscript as well.

Install

If you use vite-plugin-monkey:

npm i @sec-ant/gm-fetch

or just plain userscript (change latest to the version number as needed):

// @require   https://cdn.jsdelivr.net/npm/@sec-ant/gm-fetch@latest/dist/index.iife.js

Usage

Grant necessary GM_APIs:

vite-plugin-monkey:

{
  plugins: [
    monkey({
      userscript: {
        // or GM.xmlHttpRequest
        grant: "GM_xmlhttpRequest",
        // whatever websites you're to make requests to
        connect: ["github.com"],
      },
    }),
  ];
}

plain userscript:

// @grant     GM_xmlhttpRequest
// @connect   github.com

Use it just like fetch:

vite-plugin-monkey:

import gmFetch from "@sec-ant/gm-fetch";

gmFetch("https://github.com/Sec-ant/gm-fetch");

plain userscript:

/* globals gmFetch */
(function () {
  "use strict";
  gmFetch("https://github.com/Sec-ant/gm-fetch");
})();

License

MIT